Consider the following reactions:

$\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}+{\mathrm{K}}_2{\mathrm{C}\mathrm{r}}_2{\mathrm{O}}_7+\underset{\text{(Conc.)}}{{\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4?\left(\mathrm{A}\right)+\text{side products}}$

(A) $+\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$
$\left(\mathrm{B}\right)+$ Side products
(B) $+{\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4+{\mathrm{H}}_2{\mathrm{O}}_2?($  dilute)
(C) + Side products

The sum of the total number of atoms in one molecule each of $\left(A\right),\left(B\right)$ and $\left(C\right)$  is         

Kindly consider the following 

Magnetic moment (in BM) of Cu²⁺ ion is

K₂Cr₂O₇ + H₂O₂ + H₂SO_{4 $\underset{conditions}{\overset{ether cold}{\to }}$} <!-- [if gte mso 9]><xml> </xml><![endif]-->compound 'X' X is a chromium compound, what is the oxidation state of chromium in compound 'X'.

Alkaline KMnO oxidises lodide to a particular product (A). Determine the oxidation state of lodine in compound (A).

Which of the following pair will be formed by the decomposition of KMnO₄?